Mathematics – Logic
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998p%26ss...46..329c&link_type=abstract
Planetary and Space Science, v. 46, p. 329-340.
Mathematics
Logic
1
Scientific paper
Some metallic microspherules were found in a calcareous-marly sample from the Romanoro Flysch (Modena district, Northern Apennines, Italy). The outcrop is a tectonic scale, part of the Sestola-Vidiciatico Unit, without stratigraphic contacts with other formations. The age of the setting stratum was attributed at the middle Miocene, but this datum contradicts the previous authors, who dated the outcrop at the Eocene, or Cretaceous. Morphological, mineralogical and chemical studies were carried out on the microspherules and on some grains. The crust of microspherules is essentially made of iron from (66% to 48%, like FeO), with other minor elements (Al, Ti, Mn, Ni). The core is made of an Fe-Ni alloy. There are other grains of: quartz, calcite, pyrite, mica and black minerals, with edges. The black ones are polymetallic aggregates of: Fe, Mn, Ti, Al, Cu. About the origin of these microspherules four hypotheses: cosmic origin (exceptional extraterrestrial event), volcanic origin, diagenetic origin, wartime origin (Extrema Ratio). The first one has been confirmed.
Colimbetti A.
Ferrari Gabriele
Nicolodi F.
Panini F.
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